In search of her missing father, Tachibana Izumi visits the Mankai Company Theatre, where he previously served as director. Instead, she discovers a theatre group weighed down by massive debt, featuring only a single young actor and lacking any notable success. To rescue the theatre her father cherished so deeply, Izumi must assume the role of new director, reorganize the four troupes—Spring, Summer, Autumn, and Winter—and guide the company toward success. This manga chronicles the story of the first troupe, the Spring Troupe (Haru-gumi).